The invention belongs to the field of preparation of organic compounds. The invention provides a preparation method of DL-hydroxy selenomethionine. The method is characterized in that gamma-butyrolactone is used as a raw material, alpha-hydroxyl-gamma-butyrolactone is synthesized through alpha-bromination and hydroxylation, and then the alpha-hydroxyl-gamma-butyrolactone reacts with sodium methyl selenol to obtain the DL-hydroxyl selenomethionine. The method has the advantages of easily available raw materials, mild reaction conditions and low cost, and is suitable for large-scale preparation of DL-hydroxyselenomethionine.
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Paragraph 0020-0023
(2021/06/02)
Process for preparing 2-hydroxy-4-methylselenobutyric acid, alone or as a mixture with its sulphur-containing analogue, and uses thereof in nutrition, in particular animal nutrition
The present invention relates to a novel process for preparing 2-hydroxy-4-methylselenobutyric acid from 3-methylselenoproprion-aldehyde. The 2-hydroxy-4-methylselenobutyric acid is obtained alone or as a mixture with its sulphur-containing analogue. The invention also relates to the compositions, in particular nutritional compositions, comprising a mixture of 2-hydroxy-4-methylselenobutyric acid and 2-hydroxy-4-methylthiobutyric acid, and a physiologically acceptable medium, and to the use of this mixture as a dietary ingredient.
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Page/Page column 7
(2012/12/13)
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